Abstract
Subtle and interesting connections between the Preisach model of hysteresis and nonlinear diffusion are discussed. On this basis, Preisach modeling of eddy current hysteresis and superconducting hysteresis is presented. It is stressed that rate-dependent eddy current hysteresis can be fully characterized by its step response. Preisach representation of eddy current hysteresis is then used for the calculation of eddy current losses and the universality of the ‘ f 2 -law’ for these losses is emphasized. Experimental results that provide evidence for remarkable accuracy of the Preisach description of superconducting hysteresis are presented.
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